eli5 why you don’t get infections from your mouth, nose, or ears often? What’s the difference between those openings and if you had an open wound which could easily get infected

Question

eli5 why you don’t get infections from your mouth, nose, or ears often? What’s the difference between those openings and if you had an open wound which could easily get infected

In: 37

Answer 1

On the other side, cold viruses and COVID and such enter through the mouth, nose and eyes since they have evolved to attach to molecular receptors present in those orifices